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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_jmicron.c - JMicron ATA driver for non AHCI mode. This drives the
3 * PATA port of the controller. The SATA ports are
4 * driven by AHCI in the usual configuration although
5 * this driver can handle other setups if we need it.
6 *
Alan Coxab771632008-10-27 15:09:10 +00007 * (c) 2006 Red Hat
Jeff Garzik669a5db2006-08-29 18:12:40 -04008 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/pci.h>
13#include <linux/init.h>
14#include <linux/blkdev.h>
15#include <linux/delay.h>
16#include <linux/device.h>
17#include <scsi/scsi_host.h>
18#include <linux/libata.h>
19#include <linux/ata.h>
20
21#define DRV_NAME "pata_jmicron"
Jeff Garzik8bc3fc42007-05-21 20:26:38 -040022#define DRV_VERSION "0.1.5"
Jeff Garzik669a5db2006-08-29 18:12:40 -040023
24typedef enum {
25 PORT_PATA0 = 0,
26 PORT_PATA1 = 1,
27 PORT_SATA = 2,
28} port_type;
29
30/**
31 * jmicron_pre_reset - check for 40/80 pin
Tejun Heocc0680a2007-08-06 18:36:23 +090032 * @link: ATA link
Tejun Heod4b2bab2007-02-02 16:50:52 +090033 * @deadline: deadline jiffies for the operation
Jeff Garzik669a5db2006-08-29 18:12:40 -040034 *
35 * Perform the PATA port setup we need.
Tejun Heod4b2bab2007-02-02 16:50:52 +090036 *
Jeff Garzik669a5db2006-08-29 18:12:40 -040037 * On the Jmicron 361/363 there is a single PATA port that can be mapped
38 * either as primary or secondary (or neither). We don't do any policy
39 * and setup here. We assume that has been done by init_one and the
40 * BIOS.
41 */
Tejun Heocc0680a2007-08-06 18:36:23 +090042static int jmicron_pre_reset(struct ata_link *link, unsigned long deadline)
Jeff Garzik669a5db2006-08-29 18:12:40 -040043{
Tejun Heocc0680a2007-08-06 18:36:23 +090044 struct ata_port *ap = link->ap;
Jeff Garzik669a5db2006-08-29 18:12:40 -040045 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
46 u32 control;
47 u32 control5;
48 int port_mask = 1<< (4 * ap->port_no);
49 int port = ap->port_no;
50 port_type port_map[2];
51
52 /* Check if our port is enabled */
53 pci_read_config_dword(pdev, 0x40, &control);
54 if ((control & port_mask) == 0)
Alan Coxc9619222006-09-26 17:53:38 +010055 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -040056
57 /* There are two basic mappings. One has the two SATA ports merged
58 as master/slave and the secondary as PATA, the other has only the
59 SATA port mapped */
60 if (control & (1 << 23)) {
61 port_map[0] = PORT_SATA;
62 port_map[1] = PORT_PATA0;
63 } else {
64 port_map[0] = PORT_SATA;
65 port_map[1] = PORT_SATA;
66 }
67
68 /* The 365/366 may have this bit set to map the second PATA port
69 as the internal primary channel */
70 pci_read_config_dword(pdev, 0x80, &control5);
71 if (control5 & (1<<24))
72 port_map[0] = PORT_PATA1;
73
74 /* The two ports may then be logically swapped by the firmware */
75 if (control & (1 << 22))
76 port = port ^ 1;
77
78 /*
79 * Now we know which physical port we are talking about we can
80 * actually do our cable checking etc. Thankfully we don't need
81 * to do the plumbing for other cases.
82 */
Tejun Heo0706efd2007-11-19 18:06:11 +090083 switch (port_map[port]) {
Jeff Garzik669a5db2006-08-29 18:12:40 -040084 case PORT_PATA0:
Tejun Heo0706efd2007-11-19 18:06:11 +090085 if ((control & (1 << 5)) == 0)
86 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -040087 if (control & (1 << 3)) /* 40/80 pin primary */
88 ap->cbl = ATA_CBL_PATA40;
89 else
90 ap->cbl = ATA_CBL_PATA80;
91 break;
92 case PORT_PATA1:
93 /* Bit 21 is set if the port is enabled */
94 if ((control5 & (1 << 21)) == 0)
Tejun Heo0706efd2007-11-19 18:06:11 +090095 return -ENOENT;
Jeff Garzik669a5db2006-08-29 18:12:40 -040096 if (control5 & (1 << 19)) /* 40/80 pin secondary */
97 ap->cbl = ATA_CBL_PATA40;
98 else
99 ap->cbl = ATA_CBL_PATA80;
100 break;
101 case PORT_SATA:
102 ap->cbl = ATA_CBL_SATA;
103 break;
104 }
Tejun Heo9363c382008-04-07 22:47:16 +0900105 return ata_sff_prereset(link, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400106}
107
Jeff Garzik669a5db2006-08-29 18:12:40 -0400108/* No PIO or DMA methods needed for this device */
109
110static struct scsi_host_template jmicron_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900111 ATA_BMDMA_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400112};
113
Tejun Heo029cfd62008-03-25 12:22:49 +0900114static struct ata_port_operations jmicron_ops = {
115 .inherits = &ata_bmdma_port_ops,
Tejun Heo887125e2008-03-25 12:22:49 +0900116 .prereset = jmicron_pre_reset,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400117};
118
119
120/**
121 * jmicron_init_one - Register Jmicron ATA PCI device with kernel services
122 * @pdev: PCI device to register
123 * @ent: Entry in jmicron_pci_tbl matching with @pdev
124 *
125 * Called from kernel PCI layer.
126 *
127 * LOCKING:
128 * Inherited from PCI layer (may sleep).
129 *
130 * RETURNS:
131 * Zero on success, or -ERRNO value.
132 */
133
134static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
135{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200136 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400137 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400138
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100139 .pio_mask = ATA_PIO4,
140 .mwdma_mask = ATA_MWDMA2,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400141 .udma_mask = ATA_UDMA5,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400142
143 .port_ops = &jmicron_ops,
144 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200145 const struct ata_port_info *ppi[] = { &info, NULL };
Jeff Garzik669a5db2006-08-29 18:12:40 -0400146
Alan Cox16ea0fc2010-02-23 02:26:06 -0500147 return ata_pci_sff_init_one(pdev, ppi, &jmicron_sht, NULL, 0);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400148}
149
150static const struct pci_device_id jmicron_pci_tbl[] = {
Tejun Heoa01f48b2007-10-07 07:04:50 +0900151 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
152 PCI_CLASS_STORAGE_IDE << 8, 0xffff00, 0 },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400153 { } /* terminate list */
154};
155
156static struct pci_driver jmicron_pci_driver = {
157 .name = DRV_NAME,
158 .id_table = jmicron_pci_tbl,
159 .probe = jmicron_init_one,
160 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900161#ifdef CONFIG_PM
Aland39ca892006-11-22 17:18:30 +0000162 .suspend = ata_pci_device_suspend,
Tejun Heo960627b2007-02-26 20:09:02 +0900163 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900164#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400165};
166
167static int __init jmicron_init(void)
168{
169 return pci_register_driver(&jmicron_pci_driver);
170}
171
172static void __exit jmicron_exit(void)
173{
174 pci_unregister_driver(&jmicron_pci_driver);
175}
Jeff Garzik669a5db2006-08-29 18:12:40 -0400176
177module_init(jmicron_init);
178module_exit(jmicron_exit);
179
180MODULE_AUTHOR("Alan Cox");
181MODULE_DESCRIPTION("SCSI low-level driver for Jmicron PATA ports");
182MODULE_LICENSE("GPL");
183MODULE_DEVICE_TABLE(pci, jmicron_pci_tbl);
184MODULE_VERSION(DRV_VERSION);
185